This is feeling very much like the Starwood Platinum guaranteed room upgrade guarantee.

Starwood corporate says: "Our Best Rooms. Expect automatic upgrades at check-in, including Select Standard Suites"

Starwood front desk clerks do whatever they please. Half the time you're told "no suites available" and the savvy FTer goes to the room, fires up the laptop and sees that the property is still selling all kids of suites.